//
// Copyright (c) 2004-2024 Jaroslaw Kowalski <jaak@jkowalski.net>, Kim Christensen, Julian Verdurmen
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// * Redistributions of source code must retain the above copyright notice,
//   this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution.
//
// * Neither the name of Jaroslaw Kowalski nor the names of its
//   contributors may be used to endorse or promote products derived from this
//   software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
//

namespace NLog.LayoutRenderers
{
    using System.Text;
    using NLog.Config;
    using NLog.Internal;
    using NLog.Internal.Fakeables;

    /// <summary>
    /// The identifier of the current process.
    /// </summary>
    /// <remarks>
    /// <a href="https://github.com/NLog/NLog/wiki/ProcessId-Layout-Renderer">See NLog Wiki</a>
    /// </remarks>
    /// <seealso href="https://github.com/NLog/NLog/wiki/ProcessId-Layout-Renderer">Documentation on NLog Wiki</seealso>
    [LayoutRenderer("processid")]
    [AppDomainFixedOutput]
    [ThreadAgnostic]
    public class ProcessIdLayoutRenderer : LayoutRenderer, IRawValue
    {
        private readonly int _processId;

        /// <summary>
        /// Initializes a new instance of the <see cref="ProcessIdLayoutRenderer" /> class.
        /// </summary>
        public ProcessIdLayoutRenderer()
            : this(LogFactory.DefaultAppEnvironment)
        {
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="ProcessIdLayoutRenderer" /> class.
        /// </summary>
        internal ProcessIdLayoutRenderer(IAppEnvironment appEnvironment)
        {
            _processId = appEnvironment.CurrentProcessId;
        }

        /// <inheritdoc/>
        protected override void Append(StringBuilder builder, LogEventInfo logEvent)
        {
            builder.AppendInvariant(_processId);
        }

        bool IRawValue.TryGetRawValue(LogEventInfo logEvent, out object value)
        {
            value = _processId;
            return true;
        }
    }
}
